Datasheet ADP5042 (Analog Devices) - 10

ADP5042 Data Sheet 1.795 100 3.6V 1.794 90 4.5V +85°C 5.5V 1.793 80 ) 1.792 V 70 ( +25°C 1.791 GE %) ( 60 Y 1.790 C OLTA N 50 IE 1.789 T V U 40 1.788 FFIC TP E OU 30 1.787 1.786 20 –40°C 1.785
009
10
012 1- 1 1- 1
1.784
088
0
088
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.001 0.01 0.1 1 OUTPUT CURRENT (A) OUTPUT CURRENT (A)
Figure 9. Buck Load Regulation Across Temperature, VOUT1 = 1.8 V, Figure 12. Buck Efficiency vs. Load Current, Across Input Voltage, PWM Mode VOUT1 = 3.3 V, PWM Mode
1.797 100 90 1.796 80 ) 1.795 V VIN = 5.5V ( 70 GE %) ( 60 1.794 VIN = 4.5V Y C OLTA N 50 IE T V 1.793 U 40 FFIC TP VIN = 3.6V E OU 1.792 30 20 1.791 2.4V 3.6V
010
10
013 1-
4.5V
1 1- 1
5.5V 1.790
088
0
088
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.0001 0.001 0.01 0.1 1 OUTPUT CURRENT (A) OUTPUT CURRENT (A)
Figure 10. Buck Load Regulation Across Input Voltage, VOUT1 = 1.8 V, PWM Figure 13. Buck Efficiency vs. Load Current, Across Input Voltage, Mode VOUT1 = 1.8 V, Auto Mode
100 100 2.4V 3.6V 90 90 4.5V 5.5V 80 80 70 70 %) %) ( 60 ( 60 Y Y C C N 50 N 50 IE IE 40 40 FFIC FFIC E E 30 30 20 20 3.6V
1
10
1
4.5V 10
014 -0 1 1-
5.5V
1 1
0
088
0
088
0.0001 0.001 0.01 0.1 1 0.001 0.01 0.1 1 OUTPUT CURRENT (A) IOUT (A)
Figure 11. Buck Efficiency vs. Load Current, Across Input Voltage, Figure 14. Buck Efficiency vs. Load Current, Across Input Voltage, VOUT1 = 3.3 V, Auto Mode VOUT2 = 1.8 V, PWM Mode Rev. B | Page 10 of 30 Document Outline FEATURES HIGH LEVEL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GENERAL SPECIFICATION SUPERVISORY SPECIFICATION BUCK SPECIFICATIONS LDO1, LDO2 SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER MANAGEMENT UNIT Thermal Protection Undervoltage Lockout Enable/Shutdown BUCK SECTION Control Scheme PWM Mode Power Save Mode (PSM) PSM Current Threshold Short-Circuit Protection Soft Start Current Limit 100% Duty Operation LDO SECTION SUPERVISORY SECTION Reset Output Manual Reset Input Watchdog 1 Input Watchdog 2 Input Watchdog Status Indicator APPLICATIONS INFORMATION BUCK EXTERNAL COMPONENT SELECTION Inductor Output Capacitor Input Capacitor LDO CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties SUPERVISORY SECTION Watchdog 1 Input Current Negative-Going VCC Transients Watchdog Software Considerations PCB LAYOUT GUIDELINES EVALUATION BOARD SCHEMATICS AND ARTWORK SUGGESTED LAYOUT BILL OF MATERIALS APPLICATION DIAGRAM FACTORY PROGRAMMABLE OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE